<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box div {
            display: inline-block;
            width: 150px;
            height: 40px;
            text-align: center;
            color: #fff;
            line-height: 40px;
            background: red;
        }

        .box div:hover {
            cursor: pointer;
            background: orange;
        }

        a:link {
            color: green;
        }
    </style>
</head>

<body>
    <div class="box">
        <div>导航1</div>
        <div>导航2</div>
        <div>导航3</div>
        <div>导航4</div>
        <div>导航5</div>
    </div>
    <a href="">百度</a>
    <style>
        p {
            font-size: 18px;
            color: #369;
            text-decoration: line-through;
        }
    </style>
    <p>1</p>
    <input type="text" placeholder="提示性文本" value="666">
</body>

</html>